The new Ceph container demo is super dope!

I have been recently working on refactoring our Ceph container images.
We used to have two separate images for daemon and demo.
Recently, for Luminous, I decided to merge the demo container into daemon.
It makes everything easier, code is in a single place, we only have a single image to test with the CI and users have a single image to play with.

As reminder, this is what the container can do for you:

Bootstrap a single Ceph monitor

Bootstrap a single Ceph OSD with Bluestore (running on a filesystem)

Bootstrap a single MDS server

Bootstrap a RGW instance with optionally a user and the ability to interact with s3cmd.